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Oracle MySQL HeatWave Implementation Associate Rel 1 Sample Questions (Q42-Q47):

NEW QUESTION # 42
A query is not offloaded to the HeatWave cluster for execution. Which three are possible reasons? (Choose three.)

A. The client is connected to the DB system instead of the HeatWave cluster.
B. The use_secondary_engine session variable is OFF.
C. The query estimated cost is less than the query cost threshold.
D. The user does not have privileges to access the HeatWave cluster.
E. A required column is excluded from the RAPID secondary engine.

Answer: A,B,E

Explanation:
A query may not be offloaded to the HeatWave cluster for execution due to the following reasons:
A:Theuse_secondary_enginesession variable is OFF: This setting controls whether queries should be offloaded to the secondary engine (HeatWave). B.The client is connected to the DB system instead of the HeatWave cluster: For queries to be offloaded, the client must be connected to the HeatWave cluster. E.A required column is excluded from the RAPID secondary engine: If a necessary column is not available in the HeatWave (RAPID) secondary engine, the query cannot be offloaded.

NEW QUESTION # 43
You have a MySQL DB system with five active read replicas. The workload consists of 5% writes and 95% reads.
Which connection method provides the fastest query response time?

A. Connect to the read replica load balancer to perform read-only operations.
B. Connect to the read replica load balancer to perform read/write operations.
C. Connect to the source DB system to perform read-only operations.
D. Connect to a specific read replica to perform read-only operations.

Answer: A

Explanation:
For a MySQL DB system with five active read replicas and a workload consisting mostly of reads, the fastest query response time is achieved by:
C:Connect to the read replica load balancer to perform read-only operations: The read replica load balancer distributes the read workload across all replicas, optimizing performance and response time.

NEW QUESTION # 44
You want to replicate data from an on-premises MySQL server to a MySQL DB system. The on-premises MySQL server runs in your corporate network. The MySQL server accepts incoming connections from the Internet on a public IP endpoint.
The DB system runs in Oracle Cloud Infrastructure. The DB system endpoint is connected to a privatesubnet of a VCN.
Which network configuration is required?

A. Configure an OCI network load balancer to accept incoming connections on a public IP and route to the DB system private IP address.
B. Create an Internet gateway in the VCN and configure the DB system subnet to route Internet-bound traffic to the Internet gateway.
C. Create a NAT gateway in the VCN and configure the DB system subnet to route Internet-bound traffic to the NAT gateway.
D. Create a service gateway in the VCN and configure the DB system subnet to route Internet-bound traffic to the service gateway.

Answer: C

Explanation:
To replicate data from an on-premises MySQL server to a MySQL DB system running in Oracle Cloud Infrastructure (OCI), where the DB system is connected to a private subnet of a Virtual Cloud Network (VCN), you need to enable the DB system to communicate with the Internet securely. The correct configuration is tocreate a NAT gateway in the VCN and configure the DB system subnet to route Internet-bound traffic to the NAT gateway(Answer D).
* NAT Gateway: A Network Address Translation (NAT) gateway enables instances in a private subnet to initiate outbound traffic to the Internet, but it prevents the Internet from initiating connections to those instances.
* Route Table Configuration: You need to update the route table for the private subnet to direct traffic destined for the Internet to the NAT gateway.
Steps:
* Create a NAT gateway in the OCI Console.
* Update the route table associated with the private subnet to include a route rule that directs all Internet-bound traffic (0.0.0.0/0) to the NAT gateway.
References:
* OCI NAT Gateway Documentation
* Configuring Routing for Private Subnets

NEW QUESTION # 45
You want to create a new DB system with data import. How do you prepare the data?

A. Export the data into the file system with a MySQL Shell dump utility
B. Export the data into anObject Storage bucket with a MySQL Shell dump utility.
C. Back up the database into an Object Storage bucket with MySQL Enterprise Backup.
D. Export the data into the file system with the mysqldump client utility.

Answer: B

Explanation:
To prepare data for a new DB system with data import in OCI, you shouldexport the data into an Object Storage bucket with a MySQL Shell dump utility(Answer B). This method allows you to store the data in a scalable and durable object storage service before importing it into the new DB system.
Steps:
* Use MySQL Shell dump utility to export the data.
* Save the export files to an Object Storage bucket in OCI.
* Import the data from the Object Storage bucket into the new DB system.
References:
* MySQL Shell Documentation
* OCI Object Storage Documentation

NEW QUESTION # 46
Which two are true about MySQL HeatWave configuration resources? (Choose two.)

A. You must copy the configuration before changing any variable values.
B. You can set a value for any global MySQL variable in a configuration.
C. You can compare configurations in the same compartment in OCI console.
D. You can view custom configuration sets with the OCI CLI oci mysql db-system get command.

Answer: B,D

Explanation:
A:You can set a value for any global MySQL variable in a configuration: MySQL HeatWave allows you to configure and set global MySQL variables to optimize performance and customize the environment as needed.
C:You can view custom configuration sets with the OCI CLIoci mysql db-system getcommand: The OCI CLI provides commands to retrieve details about MySQL DB systems, including custom configurations.

NEW QUESTION # 47
......

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